\name{ltsa.bad}
\docType{data}
\alias{ltsa.bad}
\title{Topo: No-Trawl Zones in Longspine Thornyhead Survey Area}
\description{
  PolySet of polygons describing 26 no-trawl zones in the Longspine Thornyhead 
  survey strata off the west coast of Vancouver Island, according to Chris Roberts (CGRCS).
}
\usage{data(ltsa.bad)}
\format{
  Data frame comprising 4 columns: \cr
    \code{PID...}{primary polygon ID} \cr
    \code{POS...}{position of each vertex within a given polygon} \cr
    \code{X.....}{longitude coordinates} \cr
    \code{Y.....}{latitude coordinates}
}
\details{
  The 983 vertices trace 26 contours which describe the 26 no-trawl areas 
  in the Longspine Thornyhead survey strata.

  A data frame attached as an attribute called \code{PolyData} gives details on 
  the 26 no-trawl zones specified by Chris Roberts. \code{PolyData} has 4 columns: \cr
  \code{PID......}{primary polygon ID,} \cr
  \code{BM6......}{fishing ground \code{\link{ltmose07}} in which the no-trawl polygon occurs,} \cr
  \code{label....}{one-word label describing the zone, and} \cr
  \code{detail...}{detailed description of the zone.}

  Note there are numerous no-trawl zones in the Quatsino region (BM7, strata G); however,
  these were not mapped at the time this data file was created.
}
\source{
  Chris Roberts, Canadian Groundfish Research and Conservation Society, New Westminster BC.
}
\references{
  Krishka, B.A., Starr, P.J. and Choromanski, E.M. (2005) Longspine Thornyhead 
  random stratified trawl survey off the West Coast of Vancouver Island, 
  September 4--21, 2003. \emph{Canadian Technical Report of Fisheries and Aquatic 
  Sciences} \bold{2577}, vi + 93 pp. \cr
  \url{http://www.dfo-mpo.gc.ca/libraries-bibliotheques/tech-eng.htm}

  Schnute, J., Haigh R., Krishka, B., Sinclair, A. and Starr, P. (2004) 
  The British Columbia Longspine Thornyhead fishery: analysis of survey and 
  commercial data (1996--2003). \emph{Canadian Science Advisory Secretariat, 
  Research Document} \bold{2004/059}, 75 pp. \cr
  \url{http://www.dfo-mpo.gc.ca/csas/CSAS/publications/ResDocs-DocRech/2004/2004_059_E.htm}

  Starr, P.J., Krishka, B.A. and Choromanski, E.M. (2002) Trawl survey for 
  Thornyhead biomass estimation off the West Coast of Vancouver Island, 
  September 15 to October 2, 2001. \emph{Canadian Technical Report of Fisheries and 
  Aquatic Sciences} \bold{2421}, 60 pp.

  Starr, P.J., Krishka, B.A. and Choromanski, E.M. (2002) Longspine Thornyhead 
  random stratified trawl survey off the West Coast of Vancouver Island, 
  September 6--23, 2002. \emph{Canadian Technical Report of Fisheries and Aquatic 
  Sciences} \bold{2558}, 81 pp. \cr
  \url{http://www.dfo-mpo.gc.ca/libraries-bibliotheques/tech-eng.htm}
}
\examples{
\dontrun{
local(envir=.PBSdataEnv,expr={
pbsfun=function(){ 
  opar = par(no.readonly=TRUE); on.exit(par(opar))
  if (!require(PBSmapping, quietly=TRUE)) stop("`PBSmapping` package is required")
  data(ltsa,ltsa.bad,envir=.PBSdataEnv)
  plotMap(ltsa,border="grey")
  addPolys(ltsa.bad,col="pink",border="red");
  addLabels(attributes(ltsa.bad)$PolyData,polys=ltsa.bad,placement="MEAN_XY",
    col="blue",cex=0.7,adj=-.3) 
  invisible() }
pbsfun()
})
}
}
\seealso{
  \code{\link{ltmose07}},  \code{\link{trawlability}}
}
\keyword{datasets}
